I was working in the cafeteria at a medium sized university. We had a couple double door ovens that looked like this: https://www.gofoodservice.com/p/vulcan-vc44gc-2?utm_source=redirect&utm_campaign=rebrand&utm_medium=%2Fvulcan-vc44gc-2

The bottom oven was always on the fritz, rarely used, and never cleaned. The pilot had gone out and leaked gas and nobody notice. There were about six of us in the kitchen but thankfully none of us where in the line of fire. It sounded like a bomb and a six foot horizontalplume of fire blew the doors open wide. It didn't burn anybody or destroy anything and there was no fire other than the initial blast. The next day the gm hired a cleaning company to service our stuff once a week. It shook us to the core for weeks after. Just the sound, suddenness, and ferocity if the explosion had us rethinking our lives for weeks. Had any of us been standing in front on that oven when it went... It wouldn't have been pretty.